CN102262985A - Multipolar DC molded case circuit breaker - Google Patents
Multipolar DC molded case circuit breaker Download PDFInfo
- Publication number
- CN102262985A CN102262985A CN201110003946XA CN201110003946A CN102262985A CN 102262985 A CN102262985 A CN 102262985A CN 201110003946X A CN201110003946X A CN 201110003946XA CN 201110003946 A CN201110003946 A CN 201110003946A CN 102262985 A CN102262985 A CN 102262985A
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- permanent magnet
- circuit breaker
- contact
- magnetic conductive
- control device
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Abstract
The invention discloses a multipolar DC molded case circuit breaker, which solves the problems of arc and relatively lower operating voltage caused by difficulties in breaking DC failures in the prior art. The multipolar DC molded case circuit breaker comprises a case, and a contact system, an overload protection tripper, a short-circuit protection tripper, a wiring board and arc quenching chambers of each pole which are assembled in the case. Technical key points are that: the case is made from a dough molding compound; a permanent magnet magnetic quenching mechanism is arranged at a single breakpoint between a moving contact and a fixed contact, and comprises a permanent magnet which is assembled at the bottom of a substrate; the upper ends of two concentrating flux plates are arranged on the two sides, corresponding to an arc generation position, of a contact room of the arc quenching chamber respectively, and the lower ends of the concentrating flux plates are inserted into the substrate; and the two ends of the permanent magnet are in seamless absorption connection with the end parts of the two concentrating flux plates respectively. The multipolar DC molded case circuit breaker has a rational design, a compact structure, a small volume and a rated operating voltage even capable of reaching a kilovolt level, and meets the requirements of electric motor coaches for public transportation and photovoltaic power generation and wind power generation systems on battery pack isolation and protection.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus switch, particularly a kind of on the architecture basics of the existing contact system that exchanges plastic casing circuit breaker single-break improved multipole direct current plastic casing circuit breaker.Be mainly used in rated operational voltage and can reach power supply switching and the circuit control place of 600V to kilovolt level.
Background technology
At present, the power supply that is mainly used in industrial and mineral traction locomotive, power plant, storage battery switch and the kind of the dc circuit breaker of circuit control more, mostly be the two poles of the earth greatly, the two poles of the earth or generally be referred to as multipole more than the two poles of the earth.General the two poles of the earth (2P) circuit breaker has two contact rooms, two arc control device, and four utmost points (4P) circuit breaker has four contact rooms, four arc control device.Traditional dc circuit breaker mainly comprises contact system, thermo magnetic trip release system, binding post, plastic casing, cover cap and the handle operation mechanism of single-break.Its structure be mostly on the architecture basics of the AC circuit breaker that Japan introduces, carry out improved.Because galvanic size and Orientation is normally invariable, unlike cycle of electric current of alternating current natural zero-crossing is arranged twice, can only lean on elongation electric arc, enter arc control device electric arc is cooled off arc extinguishing.Such normal circuit breaker just is difficult to the electric arc that disjunction direct current fault produces, even normal running under rated voltage, rated current, the breaking capacity of electric arc also is not high, and electric elements are lower useful life.The operating voltage of the two poles of the earth dc circuit breaker that current market is seen mostly is DC250V greatly.Owing to greatly developed green energy resources such as wind energy, solar energy in recent years, traditional dc circuit breaker can't satisfy 600V to kilovolt demand of the dc circuit breaker of level.
Summary of the invention
The purpose of this invention is to provide a kind of on the architecture basics of the existing contact system that exchanges plastic casing circuit breaker single-break improved multipole direct current plastic casing circuit breaker; the electric arc and the lower problem of operating voltage of the very difficult disjunction direct current fault generation of prior art existence have been solved; it is reasonable in design; compact conformation; volume is little; the rated operational voltage of dc circuit breaker even can reach kilovolt level, satisfy public transport with electric motor coach and photovoltaic generation and wind generator system as battery pack isolate, the requirement of protection.
The technical solution adopted in the present invention is: this multipole direct current plastic casing circuit breaker comprises the shell that is made of the base and cover shell; the assembling contact system of mainly forming in the enclosure by moving contact and fixed contact; the overload protection release; the short-circuit protection release; terminal block; the arc control device of each utmost point; its technical essential is: described shell adopts BMC to make; single-break place between described moving contact and fixed contact is provided with the permanent magnet magnetic quenching mechanism that the electric arc that produces is introduced described arc control device; the set of permanent magnets of described permanent magnet magnetic quenching mechanism is contained in the bottom of described pedestal; the upper end branch of two magnetic conductive boards of described permanent magnet magnetic quenching mechanism is listed in the both sides of corresponding electric arc generation place in contact room of described arc control device; insert in the described pedestal lower end of described magnetic conductive board; and the two ends of described permanent magnet are connected respectively with the seamless absorption in the end of two described magnetic conductive boards; be exposed to the described magnetic conductive board in the described contact room; protected with thermal insulation barriers, and firm with epoxy sealing.
The set of permanent magnets of described permanent magnet magnetic quenching mechanism is contained in the base bottom of the fixedly fixed contact of described arc control device; described permanent magnet periphery covers thermal insulation barriers; two magnetic conductive boards of described permanent magnet magnetic quenching mechanism insert respectively in the through hole of pedestal both sides of fixedly fixed contact of corresponding electric arc generation place in contact room of described arc control device; the lower end of two described magnetic conductive boards is connected with the seamless absorption of difference of the two ends of described permanent magnet; described magnetic conductive board is protected with thermal insulation barriers, and firm with epoxy sealing.
The polarity of the permanent magnet of the described permanent magnet magnetic quenching mechanism of each utmost point is distributed as: the polarity of first utmost point permanent magnet is N-S, and the polarity of second utmost point permanent magnet is S-N, and the polarity of the 3rd utmost point permanent magnet is N-S, and the polarity of four-pole permanent magnet body is S-N.
Advantage and good effect that the present invention has are: because the present invention is improved on the architecture basics that has the contact system that exchanges plastic casing circuit breaker single-break now; and comprise the permanent magnet magnetic quenching mechanism that the permanent magnet that is assembled in base bottom and the seamless magnetic conductive board of being protected with thermal insulation barriers that is adsorbed on permanent magnet the two poles of the earth constitute in each utmost point single-break setting; to improve the direct current arc extinguishing ability of each utmost point single-break contact; with multipole single-break series connection arc extinguishing technology; the electric arc branch that the very difficult breath that high voltage is produced at a single-break goes out is finished jointly by a plurality of breakpoints; so it is reasonable in design; compact conformation; volume is little; significantly improved the rated operational voltage of dc circuit breaker; even can reach kilovolt level, satisfied public transport and isolated as battery pack with electric motor coach and photovoltaic generation and wind generator system; the requirement of protection.When producing electric arc between the moving contact of each utmost point single-break and the fixed contact, in the magnetic field that electric arc forms because of the magnetic conductive board at permanent magnet the two poles of the earth of being in permanent magnet magnetic quenching mechanism, can fast electric arc be divided be blown into arc control device by a plurality of breakpoints and cool off arc extinguishing.Therefore, it has fundamentally solved the electric arc and the lower problem of operating voltage of the very difficult disjunction direct current fault generation of prior art existence.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is a kind of I type structural representation of the present invention;
Fig. 2 is the cutaway view of Fig. 1 along the A-A line;
Fig. 3 is a kind of II type structural representation of the present invention;
Fig. 4 is the cutaway view of Fig. 3 along the B-B line.
Sequence number explanation among the figure: 1 pedestal, 2 permanent magnets, 3 thermal insulation barriers, 4 terminal blocks, 5 magnetic conductive boards, 6 fixed contacts, 7 grades of arc plates, 8 moving contacts, 9 arc control device, 10 cover shells, 11 handle operation mechanisms.
Embodiment
Describe concrete structure of the present invention in detail according to Fig. 1～4.This multipole direct current plastic casing circuit breaker is improved on the architecture basics of the contact system of existing interchange plastic casing circuit breaker single-break; it comprises the shell that is made of pedestal 1 and lid shell 10, is assembled in arc control device 9 and the permanent magnet magnetic quenching mechanism of branch by the contact system of mainly being made up of moving contact 8 and fixed contact 6 in a plurality of breakpoints, overload protection release, short-circuit protection release, terminal block 4, each utmost point.Wherein the specification of main member should meet the requirement of relevant criterion, and shell adopts BMC (be DMC, be also referred to as the unsaturated polyester (UP) BMC) to make.Permanent magnet magnetic quenching mechanism comprises a permanent magnet 2 and two magnetic conductive boards 5, is arranged on the single-break place between moving contact 8 and the fixed contact 6, so that the electric arc that produces is introduced in the arc control device 9.This permanent magnet magnetic quenching mechanism can be according to actual needs and may, be arranged to I type structure (shown in Fig. 1-2) by specification, the shape of arc control device 9, also can be arranged to II type structure (as shown in Figure 3-4).Its I type structure is mainly used in the less arc control device of the useful space 9.The permanent magnet 2 of this I type structure is assembled in the bottom of pedestal 1, and the upper end branch of two magnetic conductive boards 5 is listed in the both sides of corresponding electric arc generation place in contact room of arc control device 9.Insert in the pedestal 1 both sides of lower end edge terminal block 4 cross sections of magnetic conductive board 5, and the two ends of the permanent magnet 2 that is fixed on pedestal 1 bottom are connected with the seamless absorption in end of stretching out pedestal 1 bottom of two magnetic conductive boards 5 respectively.In order to reduce the influence that electric arc produces high temperature, with being exposed to the part of the magnetic conductive board 5 in the contact room, protected with thermal insulation barriers 3, and firm with epoxy sealing.Its II type structure is mainly used in the bigger arc control device of the useful space 9.The permanent magnet 2 of this II type structure is assembled in the space of base bottom of fixedly fixed contact 6 of arc control device 9, in order to reduce the influence that electric arc produces high temperature, covers thermal insulation barriers in permanent magnet 2 peripheries and is protected.Two magnetic conductive boards 5 insert respectively in the through hole of pedestal both sides of fixedly fixed contact 6 of corresponding electric arc generation place in contact room of arc control device 9, make the lower end of two magnetic conductive boards 5 distinguish seamless absorption with the two ends of permanent magnet 2 and are connected.In order to reduce the influence that electric arc produces high temperature, magnetic conductive board 5 usefulness thermal insulation barriers 3 are protected, and firm with epoxy sealing.The polarity of the permanent magnet of the described permanent magnet magnetic quenching mechanism of each utmost point is distributed as: the polarity of first utmost point permanent magnet is N-S, and the polarity of second utmost point permanent magnet is S-N, and the polarity of the 3rd utmost point permanent magnet is N-S.The polarity of four-pole permanent magnet body is S-N.
The installation of this multipole direct current plastic casing circuit breaker, debugging and use are all basic identical with existing dc circuit breaker.
Claims (3)
1. multipole direct current plastic casing circuit breaker; comprise the shell that constitutes by the base and cover shell; the assembling contact system of mainly forming in the enclosure by moving contact and fixed contact; the overload protection release; the short-circuit protection release; terminal block; the arc control device of each utmost point; it is characterized in that: described shell adopts BMC to make; single-break place between described moving contact and fixed contact is provided with the permanent magnet magnetic quenching mechanism that the electric arc that produces is introduced described arc control device; the set of permanent magnets of described permanent magnet magnetic quenching mechanism is contained in the bottom of described pedestal; the upper end branch of two magnetic conductive boards of described permanent magnet magnetic quenching mechanism is listed in the both sides of corresponding electric arc generation place in contact room of described arc control device; insert in the described pedestal lower end of described magnetic conductive board; and the two ends of described permanent magnet are connected respectively with the seamless absorption in the end of two described magnetic conductive boards; be exposed to the described magnetic conductive board in the described contact room; protected with thermal insulation barriers, and firm with epoxy sealing.
2. multipole direct current plastic casing circuit breaker according to claim 1; it is characterized in that: the set of permanent magnets of described permanent magnet magnetic quenching mechanism is contained in the base bottom of the fixedly fixed contact of described arc control device; described permanent magnet periphery covers thermal insulation barriers; two magnetic conductive boards of described permanent magnet magnetic quenching mechanism insert respectively in the through hole of pedestal both sides of fixedly fixed contact of corresponding electric arc generation place in contact room of described arc control device; the lower end of two described magnetic conductive boards is connected with the seamless absorption of difference of the two ends of described permanent magnet; described magnetic conductive board is protected with thermal insulation barriers, and firm with epoxy sealing.
3. multipole direct current plastic casing circuit breaker according to claim 1, it is characterized in that: the polarity of the permanent magnet of the described permanent magnet magnetic quenching mechanism of each utmost point is distributed as: the polarity of first utmost point permanent magnet is N-S, the polarity of second utmost point permanent magnet is S-N, the polarity of the 3rd utmost point permanent magnet is N-S, and the polarity of four-pole permanent magnet body is S-N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110003946.XA CN102262985B (en) | 2011-01-11 | 2011-01-11 | Multipolar DC molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110003946.XA CN102262985B (en) | 2011-01-11 | 2011-01-11 | Multipolar DC molded case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102262985A true CN102262985A (en) | 2011-11-30 |
| CN102262985B CN102262985B (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110003946.XA Expired - Fee Related CN102262985B (en) | 2011-01-11 | 2011-01-11 | Multipolar DC molded case circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN102262985B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269331A (en) * | 2014-09-24 | 2015-01-07 | 温州市新蓝天电器有限公司 | Breaker with thermal insulation cloth |
| CN105321782A (en) * | 2014-07-31 | 2016-02-10 | 河村电器产业株式会社 | DC circuit breaker |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388706Y (en) * | 1999-09-10 | 2000-07-19 | 李玉敏 | DC circuit breaker |
| CN2727944Y (en) * | 2004-08-02 | 2005-09-21 | 哈尔滨东大电工有限责任公司 | Bipolar DC contactor |
| CN2924772Y (en) * | 2005-12-05 | 2007-07-18 | 北京Abb低压电器有限公司 | Static contact base, arc-quenching system for miniature circuit breaker and miniature circuit breaker |
| CN101315838A (en) * | 2007-05-31 | 2008-12-03 | Abb股份有限公司 | Electric installation device with an arc blow-out assembly |
| CN201918339U (en) * | 2011-01-11 | 2011-08-03 | 沈阳二一三控制电器制造有限公司 | Multipolar direct-current circuit breaker with plastic shell |
-
2011
- 2011-01-11 CN CN201110003946.XA patent/CN102262985B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388706Y (en) * | 1999-09-10 | 2000-07-19 | 李玉敏 | DC circuit breaker |
| CN2727944Y (en) * | 2004-08-02 | 2005-09-21 | 哈尔滨东大电工有限责任公司 | Bipolar DC contactor |
| CN2924772Y (en) * | 2005-12-05 | 2007-07-18 | 北京Abb低压电器有限公司 | Static contact base, arc-quenching system for miniature circuit breaker and miniature circuit breaker |
| CN101315838A (en) * | 2007-05-31 | 2008-12-03 | Abb股份有限公司 | Electric installation device with an arc blow-out assembly |
| US20080296264A1 (en) * | 2007-05-31 | 2008-12-04 | Abb Ag | Electrical service switching device with an arc blowout device |
| CN201918339U (en) * | 2011-01-11 | 2011-08-03 | 沈阳二一三控制电器制造有限公司 | Multipolar direct-current circuit breaker with plastic shell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321782A (en) * | 2014-07-31 | 2016-02-10 | 河村电器产业株式会社 | DC circuit breaker |
| CN105321782B (en) * | 2014-07-31 | 2018-07-06 | 河村电器产业株式会社 | Dc circuit breaker |
| CN104269331A (en) * | 2014-09-24 | 2015-01-07 | 温州市新蓝天电器有限公司 | Breaker with thermal insulation cloth |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102262985B (en) | 2014-02-26 |
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Granted publication date: 20140226 Termination date: 20200111 |